.M4A file extension
This is the list of programs to work with .M4A extension
A video player that supports all common video, audio and image file formats.
multimedia player & ripper.
Allows you to seamlessly access, transfer, and playback music and movie files.
Use Acrobat X to create high-impact PDF communications.
Total Video Converter is an all-in-one shareware video converter for Windows.
BSPlayer plays standard media files and streaming contents.